Question

在尝试使用hibernate和spring mvc操作ArrayList中获得的结果时，数据库中的数据会自行更改。

以下是我的代码。

    public ArrayList<SellerDummy> listAllSellers() {
    Session session = this.sessionFactory.getCurrentSession();
    ArrayList<SellerDummy> sellerList = new ArrayList<SellerDummy>(session.createQuery("from SellerDummy").list());
    for(SellerDummy sellerDummy: sellerList){
        String sellerType = sellerDummy.getSellerType();
        SellerType sellerType1= (SellerType) session.get(SellerType.class, Integer.parseInt(sellerType));
        sellerDummy.setSellerType(sellerType1.getSellerType());
    }
    return sellerList;
}

这里DAOImpl类使用“listAllSellers”方法从SellerDummy表中检索数据。 SellerDummy表有一个名为“SellerType（VARCHAR）”的列，它保存相应SellerType [另一个表]的id（例如1 =“Manufacturer”，2 =“Wholesaler”）。我想要实现的是使用“SellerDummy”中提供的“SellerType”的id，进行查询以从“SellerType”获取相应的String并将其设置在从“SellerDummy”表获得的结果中。

更准确。对于例如如果我在“SellerDummy”的结果中得到“1”，它应该在ArrayList（sellerList）中将“1”更改为“Manufacturer”。代码在ArrayList和数据库中更改它。

sellerList的结果

    {"id":1,"organisationName":"Ta","email":"rahul.paryani.2108@gmail.com","password":"MTIxMg==","phoneNumber":"512","address":"12","address2":"12","city":"12","state":"12","pinCode":"12","statusId":"1","sellerType":"Manufacturer"}

日志

    Hibernate: select sellerdumm0_.id as id1_0_, sellerdumm0_.address as address2_0_, sellerdumm0_.address2 as address3_0_, sellerdumm0_.city as city4_0_, sellerdumm0_.email as email5_0_, sellerdumm0_.organisationName as organisa6_0_, sellerdumm0_.password as password7_0_, sellerdumm0_.phoneNumber as phoneNum8_0_, sellerdumm0_.pinCode as pinCode9_0_, sellerdumm0_.sellerType as sellerT10_0_, sellerdumm0_.state as state11_0_, sellerdumm0_.statusId as statusI12_0_ from SellerDummy sellerdumm0_
    Hibernate: select sellertype0_.id as id1_1_0_, sellertype0_.sellerType as sellerTy2_1_0_ from SellerType sellertype0_ where sellertype0_.id=?
    Hibernate: update SellerDummy set address=?, address2=?, city=?, email=?, organisationName=?, password=?, phoneNumber=?, pinCode=?, sellerType=?, state=?, statusId=? where id=?

我无法理解更新查询来自哪里???

谢谢和问候，拉胡

Answer 1

我认为sellerDummy实体处于持久状态，您可以在行sellerDummy.setSellerType(sellerType1.getSellerType());中更改它。当实体处于持久状态并且您更改它时，这些更改将在刷新会话时传播到数据库。

数据库中的spring mvc-data在操作结果时会自动更新

1 个答案: